October 21 National Days

October 21 is the 294th day of the year (295th in leap years) in the Gregorian calendar, leaving 71 days until the end of the year. Falling on a Tuesday in the 43rd week, this date features 16 national and international observances.

The day combines food-themed celebrations like International Day of the Nacho and National Pumpkin Cheesecake Day with health-focused reminders such as National Check Your Meds Day, along with cultural and awareness events from around the world.

Below is a list of all national and international days taking place on October 21, each with a brief explanation.

National & International Days on October 21

Back to the Future Day honors the time-travel adventure that begins when Marty McFly and Dr. Emmett “Doc” Brown journey from 1985 to the imagined future of 2015 in Back to the Future Part II. The date became famous because it represents the filmmakers’ vision of what the future might look like—from hoverboards to self-lacing shoes. Over time, it has turned into a cultural milestone that celebrates technological imagination and the influence of the Back to the Future trilogy on science fiction and pop culture.

Celebration of the Mind Day highlights the joy of thinking, learning, and discovering new ideas—just as Martin Gardner did through his puzzles, writings, and magic tricks. It’s a day that reminds people that curiosity and creativity are not just for scientists or mathematicians but for anyone who enjoys solving problems, asking questions, or seeing the world in a new way.

Count Your Buttons Day draws attention to one of the smallest but most practical items in everyday life—the humble button. It encourages people to notice how these tiny fasteners keep clothes together, add style, and even inspire creativity in crafts and design. The day also reminds us that something as simple as a button has a long history, evolving from decorative ornaments in ancient times to an essential part of modern fashion.

Everyone Writes Day encourages people of all ages to enjoy expressing themselves through words. It highlights that writing is part of everyday life—not only something authors do, but something everyone can use to share ideas, tell stories, and make sense of their experiences.

International Day of the Nacho honors the creation of one of the most beloved Tex-Mex dishes and the man behind it, Ignacio “Nacho” Anaya. The observance recognizes his quick thinking in 1943 when he invented the first plate of nachos for unexpected guests at a restaurant in Piedras Negras, Mexico. The day celebrates both culinary creativity and the cross-cultural connection between Mexico and the United States.

🍽️ A similar day, National Nachos Day is celebrated on November 6th.

National Apple Day 🇬🇧 reminds people how valuable apples and orchards are to everyday life. It was started in the UK in 1990 by the charity Common Ground to show how many kinds of apples exist and why it’s important to protect them. The day also highlights how apples connect people to nature, local farming, and traditions that have been part of communities for generations.

National Check Your Meds Day encourages people to take a closer look at all the medicines and supplements they use to make sure they are safe and up to date. The day was started by Consumer Reports along with the U.S. Department of Health and Human Services and the National Community Pharmacists Association. It aims to prevent medication errors by reminding people to review their prescriptions and over-the-counter drugs with a pharmacist and understand how they work together.

National Honey Day 🇬🇧 encourages people to choose locally made honey and learn why genuine, unprocessed honey matters. Created by the British Beekeepers’ Association, the day raises awareness about fake or diluted honey often found in stores and reminds consumers to support trusted local producers instead. By buying real honey, people help protect bee populations, sustain small beekeepers, and strengthen their local communities.

🍯 In the U.S., National Honey Bee Day takes place on the third Saturday of August. It highlights the importance of honey bees and beekeeping, unlike the UK’s National Honey Day on October 21, which celebrates local honey.

National Pets for Veterans Day honors the special bond between military veterans and companion animals. The observance was created by animal trainer Clarissa Black, whose dog, Bear, inspired her to start the nonprofit Pets for Vets in 2009. The organization helps match rescue animals with veterans, giving both a second chance—veterans gain comfort and emotional support, while pets find a loving home. The day highlights how these partnerships can ease the challenges of returning to civilian life and promote healing through companionship.

National Pharmacy Technician Day* (Third Tuesday in October) recognizes the vital role pharmacy technicians play in healthcare. These professionals help pharmacists prepare prescriptions, manage supplies, and ensure patients receive the right medications safely. First marked in 1991 and officially endorsed by major pharmacy organizations in 2015, the day highlights how pharmacy technicians keep pharmacies running smoothly and support patient care around the world.

National Pumpkin Cheesecake Day celebrates the combination of two beloved desserts—classic cheesecake and pumpkin pie. Cheesecake dates back to ancient Greece, but the creamy version we know today became possible after the invention of cream cheese in the early 1900s. By the 1980s, pumpkin cheesecake had become a favorite autumn treat in the United States, blending the warm flavor of pumpkin with the richness of cheesecake.

National Reptile Awareness Day helps people learn more about reptiles and why they matter to the planet. With over 10,000 species around the world, reptiles like snakes, lizards, turtles, and crocodiles each play an important role in nature. They keep ecosystems balanced by controlling pests and serving as part of the food chain. Because their health often reflects the state of the environment, studying reptiles can reveal early signs of pollution or habitat damage. The day also reminds us that many species need protection due to habitat loss, climate change, and illegal trade.

National Share the Warmth Day* (Third Tuesday in October) focuses on helping people stay warm and safe during the colder months. It was created by the nonprofit One Warm Coat, which began in 1992 with a single donated coat and has grown into a nationwide effort. The day raises awareness about the need for warm clothing and encourages communities to come together to provide coats for those who need them most. It also promotes reusing and recycling clothing to reduce waste and support sustainability.

National Witch Hazel Day recognizes the many uses of witch hazel, a natural extract from the Hamamelis virginiana plant. The observance was created in 2021 by Dickinson Brands Inc., a company known for making witch hazel products for over a century. Native Americans first discovered its soothing and healing properties, and by the 19th century, it became a popular ingredient in skincare and first aid.

Pro-Life Day of Silent Solidarity* (Third Tuesday in October) is a student-led observance that draws attention to the issue of abortion through silence. Founded in 2004 by Bryan Kemper of Stand True Ministries, the day encourages participants to stay silent to symbolize the lives they believe have been lost to abortion. It aims to promote reflection and awareness rather than confrontation, with students often sharing informational cards to explain the meaning behind their silence.

World Iodine Deficiency Day / Global Iodine Deficiency Disorders Prevention Day focuses on teaching people how important iodine is for health and brain development. The day draws attention to the fact that many people around the world still don’t get enough iodine in their diet, which can cause serious health problems, especially in children. It also promotes the simple solution of using iodized salt, a measure supported by global health organizations like UNICEF and the World Health Organization to prevent iodine deficiency.

National Days in October

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